Seamless lining for tanks.



JOHN M. BURR AND HORACE S. GIBBS, OF NORWALK, (JONNEOTICUI.

SEAMLESS LINING FOR TANKS.

Specification of Letters Patent.

Patented Nov. 24:, 1908.

Application filed October 10, 1907. Serial No. 396,786.

To all whom it may concern:

Be it known that we, JOHN M. BURR and Homer: S. GIBBS, citizens of the United States, residing at Norwalk, county of Fair field, State of Connecticut, have invented a new and useful Seamless Lining for Tanks, of which the following is a specification.

This invention has for its object to provide self-attaching seamless metallic linings, as for example the linings for water closet tanks. These linings are required to be rectangular in form and to have sides and ends perpendicular to the bottom. In practice, these linings are preferably made from copper on account of the durability and non-oxidizing quality of that metal.

In the present invention the lining is formed seamless or integral and so constructed as to be self-attaching to the tank at points which are some little distance below the tops thereof, thereby economizing material and providing means for readily securing the lining in place without the use of special attaching devices.

Our present invention enables us to provide a non-leaking and practically indestructible integral copper tank lining and at a less cost than the sectional copper linings now in use. This we accomplish by folding the metal of a blank to the required shape but without any drawing whatever or straining of the metal. The amount of metal required to make our novel integral linings is slightly greater at the corners than is required to make sectional linings, the principal saving in cost in the manufacture of our novel integral linings being in labor and in the lesser amount of material required at the tops of the linings. In addition to greatly decreased cost for labor, the cost of solder is also eliminated in making our novel integral linings.

In the accompanying drawing forming a part of this specification, Figure 1 is a plan view illustrating our novel integral selfattaching lining in place in a tank, one end of the tank being broken away to show the manner in which the corners of the lining are formed, the attaching wing being left in the vertical position as before the attachment of the lining to the tank; Fig. 2 a longitudinal section on the line 22 in Fig. 1, looking in the direction of the arrows; and Fi 3 is a transverse section on the line 33 in ig. 2.

10 denotes the tank which is simply an oblong box made of wood and is preferably provided with a groove 11 extending around its inner side near the top.

12 denotes the lining as a whole. This lining is formed from a blank of sheet metal, preferably copper, and is provided at the sides and ends with attaching wings 13 by which the lining is secured to the tank, as will be more fully explained. Having formed the blanks to the required shape the portions of the metal of each blank which form the sides and ends of the lining are bent perpendicular to the bottom portion by one or more operations which may be performed by suitable presses or in any preferred manner. The metal at the corners of the blanks is bent to the form of downwardly tapering pockets open at the top and running out at the lower corners, the opposite walls of the pockets are flattened into contact with each other and the inner faces of the folds thus formed are bent into contact with the sides and ends respectively, the folds being indicated by 14. In the completed lining, the edges of the folds extend downward and outward from the top of the lining to the lower ends of the corners, as clearly shown in Fig. 2.

The operations of forming the lining leave the wings at the top of the sides and ends standing vertically, as shown at the right in Fig. l. The ordinary mode of attaching linings to tanks has been to fold the tops of the sides and ends of the lining over the top of the tank and then nail the lining in place. As the water line in tanks of this character is always at a distance below the top of the tank, it is unnecessary for the lining to ex tend to the top. We make our novel integral linings practically self-attaching to the tanks by providing the tanks near the top with the grooves 11 and quickly and firmly secure the linings in place therein by simply turning the wings into the grooves. The operation of turning in the wings may be performed either mechanically or by hand as preferred. In practice we perform it mechanically and turn in the end wings simultaneously and the side wings simultaneously. By making the linings self-attaching in this manner below the tops of the tanks, we efiect an important saving in the amount of metal required for each lining and make the attachment of the lining to the tank a much simpler and quicker operation to perform than has heretofore been possible, thereby ellecting an additional saving in labor in the production of the completely lined tank.

Having thus described our invention we claim:

1. The combination with a tank having a groove extending around its inner side at a distance below its top, of a self-attaching integral lining provided at its sides and ends with attaching wings which are turned outward and inserted in said groove thereby securing said lining in place without requiring the use of other attaching means.

2. The combination with a tank having a groove extending around its inner side at a distance below its top, of a seamless or integral lining formed from a blank of metal,

the portions of the blank forming the sides and ends of the lining being bent perpendicular to the bottom portion thereof, and the metal at the corners being bent into double folds lying in contact with the sides and ends respectively, and the said ends and sides being provided with outwardly extending attaching wings which are inserted in said groove.

In testimony whereof we aflix our signatures in presence of two witnesses.

JOHN M. BURR. HORACE S. GIBBS.

Witnesses W'iLLIs H. SELLnoK, Crrnsrnn S. SELLECK. 

